A universal identity and physical presence detection in the form of a personal, universal transponder signal is described. This signal allows a user to interact with devices in the user's environment without having to download vendor-specific apps, set up vendor-specific accounts or be limited to a siloed eco-system of a manufacturer brand. The universal signal representing an individual allows for devices and software to detect and query the beacon transmitting the signal for information relating to the user and augmented onto the physical environment. This provides a more personalized, efficient, and, in some instances, secure experience for the user. Embodiments focus on minimizing user workload to allow for seamless interactions with her environment. Various embodiments provide a truly universal signal for all users and devices to interact, wherein all parties benefit from a seamless and natural way of interacting in the physical world.